Coiling machine



C. J. FANCHER AND R. A. JOHNSON.

'COILING MACHINE. APPLICATION FILED NOV,29, 1920.

1A83,879 Patented Oct. 311, 1922.

%[ 2 SHEETS-SHEET I.

m0 wwozs -F mcher (D 5 their aitoz'weg s: AKLIOI'ITISOY} w 55 Q I C. J. FANCHER AND R. A. JOHNSON.

COILING MACHINE.

APPLICATION FILED NOV, 29. 1920.

Patented Oct. 31, 1922.

2 SHEETS -SHEET 2.

i -m'vetow I C. r].

Fatented Get. 31, 12.

UNHT r CHARLES J. FANCHER AND ROBERT A. JOHNSON, 0F WINDSOR, VERMONT, ASSIGNOBS TO THE NATIONAL ACME COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

COILING MACHINE.

Application filed November 29, 1920. Serial No. 426,947.

T 0 all whom it may concemt:

Be it known that we, CHARLES J. FANoHnn and ROBERT A. JOHNSON, both citizens of the United States, residing at Windsor, in the county of Windsor and State of Vermont, have invented certain new and useful Improvements in Coiling Machines, of which the following is a specification.

This invention relates to coiling machines, and particularly to a machine adapted to be used in conjunction with a power press for coiling or forming a sheet metal blank into a hollow or tubular feed collet for metal working machines.

An object of this invention is to provide a machine particularly adapted to be used in connection with the manufacture of feed collets for metal working machines sub stantially as shown and described in our co-pending allowed application for improvement in feed collets, Serial No. 358,501, filed February 13, 1920, and in our copending divisional application thereof for the method of making feed collets, filed October 18, 1920, Serial No. 417,646, and which machine is simple in construction and operation, durable and effective in use, and economical to manufacture.

In the present case the blank for the feed collet, which is preferably first stamped or otherwise formed out of pressed sheet steel with projecting finger pieces, is placed in the machine, and by the application of pressure thereto the blank is bent, rolled or formed up at a single operation into substantially a cylindrical or hollow feed collet having a plurality of projecting fingers. These fingers for the collet are thereafter shaped in the desired manner, as illustrated in our co-pending application for collet forming machine.

Other objects of this invention will appear during the course of the description, reference being had to the accompanying drawings forming a part of this specification, wherein like reference characters indicate corresponding parts throughout. the several views.

Fig. 1 is a perspective View of our improved coiling machine, certain parts being broken away; Fig; 2 is a central vertical, sectional view; Fig. 3 is a plan view of the plunger mechanism; Fig. 4 is a side elevation thereof partly in section; Fig. 5 is aside view partly in section of the machine showing the position of the parts at the commencement of operation; F igi 6 is a similar View, parts being broken away, showing astep 1n the operation; Fig. 7 is a similar V ew showing another step in the operation; F 1g. 8 is a side view, parts being broken away, showing the locking mechanism; and, Fig. 9 is a plan view thereof, parts being broken away.

This improved feed collet coiling machine comprises in a general Way a movable die member or block, a plunger, and a plurality of shiftable jaw members, all cooperating to transform a sheet metal blank into substantially a U-shaped form during the movement of the die member and plunger in one direction. The forming jaws of the present improved machine in the form thereof herein shown and described are then operated and moved, as the plunger continues its movement, into a position to complete the coiling operation. In the preferred form of machine shown, this operation and movement of the jaws to complete the coiling operation is effected through a part of the plunger mechanism, the several parts having means cooperating therewith for effecting such movement.

In the present instance, the blank is transformed into a U-shaped form during the movement thereof with the die block in substantially a vertical direction, and the complete coiling thereof to form the collet is obtained by a plurality of jaws movable toward and from the die block and also therewith.

From the following description it will be observed that the first coiling step is obtained by movement of the blank relatively to the jaw members while the final coiling operation is obtained by movement of the jaw members relatively to the blank.

In its preferred form herein shown and described, our coiling machine comprises a base frame 12 having at its'center an enlarged opening 12 preferably tapered at its sides. The base is bored as at 13 to provide ways for the vertical guide rods 14 securely pinned to a die member or block 15. This die member in the present instance, has its upper surface curved to form a segment of a circle for the purpose hereinafter described. The vertical guide rods 14 at their lower ends are secured in a spring block 15 adapted to slide in a tube 17 screwed into the base of the frame 12 as at 51. The spring block 15 is normally held in the position 'illustrated in Fig. 5 and is pressed upwardly by means of a coil spring 16 resting against the bottom of the tube 17.

As hereinbefore stated, the opening 12 of the main body 12 has its sides tapered, and bolted thereto are ways 18 forming in the present instance a T-way 53 therebetween. Adapted to slide in these ways are a plurality of coiling jaws 20 normally pressed upward by means of springs 21 secured in suitable openings 52 in the base and projecting upwardly into the ways or channels 53 and engaging the underside of the forming or coiling jaws 20.

It will be observed from the drawings, that each of the forming jaws 20 has a curved shape as illustrated at 22 forming substantially a segment of a circle. In order to retain these jaws in position in their ways as shown in Fig. 1, stop plates 23' are bolted as at 24 to the upper part of the base frame 12. These plates furthermore form guides for properly locating or positioning the flat metal blank 55 at the commencement of the coiling operation.

As heretofore pointed out, the forming jaws 20 are normally urged upward in ways 53 to the open position of the die by means of coiled springs 21. Means for retaining these jaws in this position are provided comprising latches 25 suitably pivoted as at 26 to the inner sides of the jaw members. The outer ends of these latches 25 are adapted to engage rolls 3O rotatably mountedas at 31 on the base frame 12. At their inner ends the latches 31 are formed with inwardly extending arms 27 adapted in the open position of the jaws to rest in juxtaposition to each other.

These arms project into the path of the arbor 36 of the plunger and are adapted to be released thereby upon the descent of the arbor and the engagement thereof with the arms 27. Latches 25 are provided with springs 28 held in position on studs 29 and by means of which the latches are normally held in the position illustrated in Fig. 8 wherein the outer ends engage the rolls 30 and retain the forming jaws in their open position.

' In order to actuate the die member for coiling the blank 55 a suitable plunger is provided, which as illustrated by way of example in the present instance, comprises a frame member 35 having a depending portion 35, at the lower end of which is securely bolted as at 44 a forming arbor 36, which as illustrated in the present instance, is substantially cylindrical in shape. At the opposite end of the frame member 35 b means of screws 38, is secured a plate 3 preferably of greater width than the frame member, and in the present case having substantially the same width as the distance between the inner ends of the guide plates 23, so that upon descent of the plunger the plate 37 is adapted to slide freely between the inner ends of these guide plates and engage the upper surfaces of the forming jaws 20. Although in the present instance the means, as plate 37, for operating the coiling jaws, is illustrated as part of the plunger mechanism, it is obvious that such is not essential but the operation of the jaws may be accomplished by any suitable means. A supporting member in the form of a latch 39 is provided for the free end ofthe arbor 36, and for the purpose of removing the coiled piece from the-arbor after the completion of the coiling operation this supporting latch 39 is pivoted in a slot formed by wing portions 46 of the frame member 35, by means of a pin 40. This supporting latch 39 is retained in normal position as illustrated in full lines in Fig. 4: by means of spring 11 and studs 4243. It will be understood that the plunger 35 may be engaged in any power press.

In operation, and referring to Fig. 5,

will be seen that the flat blank 55 is placed in position between the adjacent guide plates 23 upon the die member 15. As the plunger 35 descends under pressure the arbor 36 engages the blank 55 to be coiled, carrying it between the coiling or forming jaws 20, and bending it to a U-shape form as illustrated in Fig. 6. In this step of the operation thercfore,it will be seen that the blank is coiled into U-shape form by means of the downward movement of the die member 15 in cooperation with the forming jaws 20. which remain stationary. Upon continuing its downward movement the arbor 36 engages the arms 27 of latches 25, releasing them from the rolls 30 as illustrated in Figs. 6 and 7 whereupon plate 37 contacts or engages with the upper surfaces of the forming jaws 20, and presses them downward in ways 53 to their closed position illustrated in Fig. 7. In this second step of the operation wherein the jaws operate to coil the blank completely around the arbor, it will be observed that these jaw members 20 have not only a downward movement, but also in order to effectually accomplish the coiling operation, they have substantially a lateral movement in a plane at right angles to the plane of movement of the die member 15.

In the present case when the arbor 36 first engages the blank 55 the same is partially bent by virtue of the segmental construction of the die 15. and die 15 are operative to start the bending of the blank and then they cooper- 'ate with the jaws 20 as shown in Fig. 6 to bend the blank into U-shaped form, and

Thus the arbor 36 eat finally the jaws 20, as shown in Fig. 7 are effective to complete the bending of the blank, it being noted that the arbor 36, die 15,, and jaws 20 are allshifted together during the final bending step.

Furthermore, it will be observed that in the normal or open position of 'therdie the die member 15 is located substantially a ove the major portion of the forming jaws 20 as illustrated in Fig. 5. In the operation, however, of coiling the blank into a c lindrical body, it will be observed that the orming jaws 20 are moved from a position substantially below the position of the die member 15 to an effective or operative position above the die member as illustrated in Fig. 7.

After the completion of the coiling operation and upon releasing the plunger 35, the die member 15 and the coiling jaws 20 will be moved to their open or normal position by means of springs 16 and 21. The jaw members 20 are also assisted in their upward movement by die member 15, which, is elevated by the spring 16 in the tube 17 During the coiling operation the blank to be coiled is held tightly by means of the pressure of spring 16 between the die member 15 and the arbor 36 from the time the operation commences until its completion. J

As illustrated in Fig. 7, it will be noted that in the final step of the coiling operation, the curved or segemental surfaces or faces 22 of the jaw members 20 are adapted to coincide or unite with the segmental or curved surface or face of the die member, and thus form substantially a perfect cylindrical bore having a diameter substantially the same as the diameter of the forming arbor 36 with the blank coiled thereabout (see Fig. 7) or in other words, the exterior diameter of the feed collet.

In the present case we have preferably illustrated a machine for'coiling a sheet metal blank having an ofiset or shouldered portion, thus forming in the completed hollow feed collet a shouldered portion adapted to be threaded for detachable attachment to the feed member of a metal working machine. The blank 55 as illustrated in dotted lines in Fig. 1 is thus provided with an ofiset or shouldered portion 55' which, upon completion of the coiling of the blank around the arbor36, (see Fig. 4) forms the shouldered cylindrical body portion 59 so constructed to permit the same to be threaded for the' purposes of attachment to the feed tube of a metal working machine. In accordance therewith the segmental cylindrical portion of the die member 15 is provided with a rabbeted portion 56 forming a shoulder. The arbor 36 is similarly formed to provide 'a shoulder 57, and the segmental portions 58.

portions 22 of the jaw members 20 are like wise similarly formed to provide shouldered The blank 55, therefore, in

such case must be so located with respect to the die member, arbor, and jaw members that upon commencement or the coilin ope-ration, the shouldered portions 56, 5% and 58 thereof will cooperate and coincide with the shouldered or offset portion 55' of 1 the blank, so that upon completion of the coiling operation the coiled blank 55 as illustrated in Fig. a, has the shouldered portion 59 for the reception of threads.

Although we have described apreferred embodiment of our invention, it will be understood that we do not limit ourselves to the exact details of construction illustrated, but may make such changes or alterations or modifications as will come within the spirit and scope of the appended claims.

We claim as our invention:

. 1. In a collet coiling machine, the combination of successivelyoperating means for coiling a sheet metal blank into a feed collet for metal working machines, said means comprising a movable means operative in one direction in co-action with and relatively to a slidable companion means to coil the blank into a substantially U-shaped form, said last means being movable relatively to said first means to complete the coiling of the blank, and controlled thereby.

2. In a collet coiling machine, the com bination of successively operating means for coiling a sheet metal blank into a feed colletfor metal working machines, said means comprising a pair of movable means opera-- tive in one direction relatively to and in co-action with a movable companion means to coil the blank into a substantially U- shaped form, said last means being movable toward and from and also in the 'samedi rection as the first movable means.

3. In a collet coiling machine, the com- 7 bination of successively operating means for coiling a sheet metal blank into a feed collet for metal working machines, said means comprising a movable means operative in one direction relatively to a slidably carried companion means to coil the blank into a substantially Ll-shaped form, said last means being movable relatively to and actgiated by .said first means to complete the c iling of collet, said guiding means comprising laterally spaced members constructed to receive the blank therebetween and vertically guide the same relatively to said coiling means, and also constructed to form means adapted to limit the upward movement of said coiling means.

6. In a machine of the class described, the combination of cooperating means constructed and operative to bend a metal blank having a shouldered portion into a feed collet having a cylindrical shouldered portion, said means including a pair of membershaving one a shouldered portion cooperating with a depressed portionof the other, said portions constructed to have segmental cylindrical formations.

7. In a machine of the class described the combination of cooperating means constructed and operative to bend a metal blank having a shouldered portion into a feed collet having acylindrical shouldered portion, said means including an arbor and a cooperating die member, one thereof having a segmental cylindrical raised portion and the other means for receiving the same.

8. In a machine of the class described, the combination of cooperating means constructed and operative to bend a metal blank having a shouldered portion into a feed collet having a cylindrical shouldered portion, said means including an arbor, a 00- operating die member and a plurality of jaw members said arbor having a shoulder formed cylindrical portion and said members having means cooperating therewith.

9. In a machine of the class described, the combination of successively actuated coopcrating means constructed and operative to bend a metal blank having a shouldered portion into a feed collet, having a cylindrical shouldered portion, said means including an arbor, a cooperating die member and' a plurality of jaw members, said arbor having a shoulder formed cylindrical portion and said members having means cooperating therewith.

10. In a machine of the class described, the combination of means for receiving and supporting a sheet metal blank and means for bending said blank into a hollow feed collet, and comprising means movable in one direction for partially bending the blank, meansmovable in a transverse direction for completely coiling the blank, the first means cooperating with the second means while the latter is in a fixed position to efi'ect the first bending step, and the second means cooperating with the first means while the latter is being shifted to complete the coilcombination of means forreceivmg and supporting a. sheet metal blank, and means for bendin said blank into a tubular feed 001-" let an comprising mechanism movable in one direction for, partially bending the blank, and mechanism movable relatively thereto for completely coiling the blank 'nto tubular form,-said last mechanism 00- operating with said first mechanism while both are being shifted to complete the coiling operation.

12. In a machine for coiling collets, the combination of mechanism for coilin a sheet metal blank into a hollow collet and comprising core means, and slidable means cooperating therewith for bending the blank around said core means, and means for holding said slidable means from movement during a predetermined operating movement of with said die and plunger while the same are being shifted to complete the coiling operation.

14. In a machine for forming a sheet metal blank into a feed collet, the combination of. means comprising a die and a plunger operative to partially bend the blank and convergingly movable simultaneously operative means effective to completely coil said blank into a tubular collet.

15. A machine for forming a sheet metal blank into a feed collet and comprising means operative in one direction for forming a flat blank into substantially U blank, and means controlled-thereby, but operated independently thereof in another-direction for forming said U-shaped blank into substantially a hollow feed collet.

16. A machine for forming a flat blank into a feed collet for metal working machines .and comprising a segmental die member operative in one direction for forming the fiat 'blank into substantially a U- shaped blank, cooperating segmental jaw members operative thereupon in another direction for forming said U-shaped blank into substantially a tubular feed collet, and a single means for directly controlling the operation of said die member and said jaw members.

-shaped 17. In a machine for coiling sheet metal.

blanks, a movable segmental die member, an arbor oooperatmg with said die member and operative to move the same into a position effective tobend the blank, and means con:- trolled by said last fne ns and subsequently movable independently thereof into position above said die member for completely bendingthe blank.

18. In a machine of'the class described,

the combination of an arbor, and means for bending a blank around said arbor to. form a collet body having a" cylindrical portion maae'zo adapted to be threaded, said arbor and means being one offset to have a cylindrical shoulder formed portion, and the other so constructed as to cooperate with said portion.

19-111 a machine of the class described, the combination of an arbor, and means for bending a blank around said arbor to form a collet body, said arbor andmeans being one offset to have a cylindrical shoulder formed portion, and the other so constructed as to cooperate with said portlon, said means comprising a plurality of die members shiftable in different directions.

20. In a machine for coiling blanks, c0- operating means movable in one dlrection for bending the blank, and simultaneously operative means at either side thereof convergingly movable in a plane transverse to the plane of movement of said first means to subsequently bending the blank.

21. In a coiling machine, a movable die member adapted to receive a sheet metal blank for a feed collet, movable means normally located at the side and below the same, pressure means adapted to move said die member to co-act with said movable means while the latter is in a fixed position thereby to bend said blank, and also adapted to move said die member and movable means together and one relatively to the other thereby to bend said blank 1nto a tubular body.

22. In a machine for coiling sheet metal blanks for feed collets, a support, a die member movably mounted therein, a plurality of jaw members shiftably mounted in said support, means cooperating wlth said die member and 'efi'ective to move the same relatively to and in co-action with said jaw members thereby to partially bend the blank.

23. In a machine for coiling sheet metal blanks for feed collets, a support, a segmental die member movably mounted therein, a plurality of segmental jaw members shiftably mounted in said support, means cooperating with said die member and effective to move the same relatively to and in co-action with said jaw members thereby to partially bend the blank, and means effective to move said jaw.members to an operative position above said die member thereby to bend the blank around said first means.

24. In a machine for coiling sheet metal blanks, the combination of supporting means, coiling means, carried thereby and comprising a movable segmental die member and a plurality of movable segmental jaws, a plunger for moving said die member to coact with said jaws while the latter are in a substantially fixed position thereby to bend the blank, and means for moving said jaws in a plane at right angles to the plane of movement of said die member thereby to form said blank into a hollow body.

25. In a machine for coiling sheet metal blanks, the combination of supportin means, coiling means carried thereby and comprising a movable segmental die member and a plurality of movable segmental jaws, means for locking said jaws in open position, a plunger for moving said die mem ber relatively to said jaws thereby to bend the blank, and means for moving said jaws in a plane at right angles to the plane of movement of said die member thereby to form said blank into a hollow body, said plunger comprising means for releasing said locking means, and means for moving said aws.

26. In a machine for coiling a sheet metal blank into a hollow feed collet for metal working machines, the combination of supporting means having ways, coiling means carried by said supporting means and comprising a movable segmental die member and a plurality of segmental jaws movable in said ways, means for locking said jaws in an inoperative position, a plunger comprising an arbor adapted to cooperate with said die member and move the same rela tively to said jaws thereby to bend the blank into substantially a U-shaped form, means subsequently operative to move said jaw members in a plane transverse to the plane of movement of said die member thereby to form the U-shaped blank into a tubular body, said arbor adapted to release said locking means prior to the movement of the jaw members, and means for returning said members to an inoperative position upon the release of said plunger.

27. In a machine for coiling a sheet metal blank into a hollow feed collet for metal working machines, the combination of supporting means having ways, coiling means carried by said supporting means and comprising a movable segmental die member and a plurality of segmental jaws movable in said ways, means for locking said jaws in an inoperative position, a plunger comprising an arbor adapted to cooperate with said die member and move the same relatively to said jaws thereby to bend the blank into substantially a U-shaped form, means connected to said plunger and subsequently operative to move said jaw members in a plane transverse to the plane of movement of said die member and to an operative position above said die member thereby to form the U-shaped blank into a tubular body, said arbor adapted to release said locking means prior to the movement of the jaw members, and means for returning said members to an inoperative position upon the release of said plunger.

28. In a machine for coiling a sheet metal blank into a hOLlOW feed collet for metal working machines, the combination of supportin means having ways, coiling means carrie by said supporting means and comprising a movable segmental die member and a plurality of segmental jaws movable in said ways, means for locking said jaws in an inoperative position, a plunger comprising an arbor adapted to cooperate with said die member and move the same relatively to said jaws thereby to bend the blank into substantially a U-shaped form, means connected to said plunger and subsequently operative to move said jaw members in a plane transverse to the plane of movement of said die member and to an operative position above said die member thereby to form the U-shaped blank into a tubular b0dy,s a1d arbor adapted to release said locking means prior to the movement of the jaw members, and means for returning said members to an inoperative position upon the release of said plunger, said arbor having a fixed support and a pivoted swinging support.

29. In a machine for coiling a sheet metal blank into a hollow feed collet for metal working machines, the combination of supporting means having ways, coiling means carried by said supporting means and comprising a movable segmental die member and a plurality of segmental jaws movablein said ways, means for locking said jaws in an inoperative position, a plunger comprising an arbor adapted to cooperate with said die member and move the same relatively to said jaws thereby to bend the blank into substantially a U-shaped form, means connected to said plunger and] subsequently operative to move said jaw members in a plane transverse to the plane of movement ofsaid die member and to an operative position above said die member therebyto form the U-shaped blank into a tubular body, said arbor adapted to release said locking means prior to the movement of the jaw members and means for returning said members to an inoperative posit-ion upon the release of said plunger, said arbor having a fixed support and a pivoted swinging support, said die member and jaws in operative position forming a bore therebetween having substantially the same diam eter as the coiled blank.

, 30. In a machine of the class described, the combination of means for" receiving a sheet metal blank having projecting gripping portions and comprising a segmental die member, means for bending said blank into a hollow feed collet and comprising an arbor movable in one direction for partially bending the blank, angularly related ways and means movable therein in transverse directions for completely coiling the blank, and comprising a plurality of segmental jaws.

31. In a machine of the class described, the

effect both bending steps.

32. In a machine of the class described, the combination of means for receiving'a sheet metal blank having projecting gripping portions and comprising a segmental die member, means for bending said blank into a hollow feed collet and comprising an arbor movable in one direction for partially bending the blank, and means movable in a transverse direction for completely coiling the blank and comprising a plurality of segmental jaws, all of said means cooperating with each other to effect both bending steps said arbor and die members cooperating with the jaws, while the latter are in a fixed position to efiect the first bending step and said jaws cooperating with said arbor-while the latter is being shifted to complete the coiling operation.

In a machine of the class described. the combination of a pair of shiftable means movable in transverse directions, the first means operative to start the bending of the -U-shaped member into tubular form, and

means for operating said pair of means.

34. In amachine of the class described, the combination of a pair of shiftable means movable in transverse directions, the first means operative to start the bending of the blank, and both means then cooperating to further bend the blank into a U-shaped form, and then the second means cooperating to bend the U-shaped member into tubular form, said second means coacting with said first means during the shifting of said first means and while completing the bending operation.

35. In a machine of the class described, the combination of a pair of shiftable means movable in transverse directions, the first means operative to start the bending of the blank and both means then cooperating to further bend the blank into a U-shaped form, and then the second means cooperating to bend the U-shaped member into tubular form, said second means coacting with said first means while both are being shifted and While completing the bending operation.

mea re first means operative to start the bending of the blank and both means then cooperating to further bend the blank into a U-shaped form and then the second means cooperating to bend the U-shaped member into tubular form, said second means being convergingly movable and coacting With said first means While both are being shifted and While completing the bending operation.

37. In a machine of the class described, the combination of two pairs of movable elements shiftable in transverse directions, the first pair operative to start thebending of a blank and both pairs then cooperating to further bend the blank into a U-shaped form, the second pair then cooperating to bend the U-shaped member into tubular form, and means for operating said elements.

'pair during the bending of the U-shaped member into tubular form.

' Signed at Windsor, Vermont, this 24 day of November, 1920.

CHARLES J. FANOHER, ROBERT A. JOHNSON. 

